table{
    border: 1px dashed red;
    /* border-collapse: separate;
    border-spacing: 10px; */
    border-collapse: collapse;
/* 表格单元格宽度固定 */
    table-layout: fixed;
}

table  td{
    background-color: blueviolet;
    border: 1px solid orange;
}

thead th:nth-of-type(1){
    width: 10%;
}
thead th:nth-of-type(2){
    width: 20%;

}
thead th:nth-of-type(3){
    width: 40%;
    text-align: left;
}
thead th:nth-of-type(4){
    width: 30%;
}

#box>p{
    color: darkorange;  /*设置颜色为 深橙色*/
    font-size: 80px;
}

h1 + p {
    margin-top:50px;
    color:red;
}